I usually make hyper-symmetrical creatures actively intended to move by rolling; having the simulation make them 'stand' first would mean the simulator would never find the intended movement pattern for my 4-fold mirror rotationally symmetric creations meant to roll. Granted, I realize I am likely an outlier among the playerbase; for non-rolling creations, your suggestion does make sense. If it were something that could be toggled, I'd be fine with it; just as long as it isn't forced on me when trying to make and evolve a rolling creation.